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Note 6 - Stockholders' Equity (Details Textual)						1 Months Ended	3 Months Ended			9 Months Ended
Note 6 - Stockholders' Equity (Details Textual)	Aug. 30, 2024 USD ($) $ / shares shares	Aug. 21, 2024 USD ($) $ / shares shares	Jul. 12, 2024 USD ($) $ / shares shares	May 21, 2024 USD ($) $ / shares shares	Jan. 16, 2024 shares	Jan. 31, 2024 shares	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) shares	Mar. 31, 2024 shares	Sep. 30, 2024 USD ($) $ / shares shares	Sep. 30, 2023 USD ($)	Dec. 31, 2023 shares
Common Stock, Shares Authorized (in shares)					150,000,000		150,000,000			150,000,000		600,000,000
Proceeds from Warrant Exercises \| $										$ 2,367,133	$ 0
Stock Issued During Period, Shares, Issued for Services (in shares)						6,703
Stock Issued During Period, Shares, Reverse Stock Splits (in shares)						55,422
Stock Incentive Plan 2020 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross										200,000
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price \| $ / shares										$ 2.23
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period										961
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							333,648			333,648
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price \| $ / shares							$ 12.71			$ 12.71
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term										7 years 2 months 12 days
Common Stock, Capital Shares Reserved for Future Issuance							333,648			333,648
May 2024 Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				582,844
Stock Issued During Period, Shares, Warrant Exercise (in shares)								582,844
May 2024 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares				$ 1.68
May 2024 Common Warrants [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				1,605,688
July 2024 Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			626,368
Stock Issued During Period, Shares, Warrant Exercise (in shares)							626,368
July 2024 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares			$ 2.86
July 2024 Common Warrants [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			2,170,000
August 21, 2024 Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		339,269
Stock Issued During Period, Shares, Warrant Exercise (in shares)							339,269
August 21 2024 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares		$ 5
August 21 2024 Common Warrants [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)		1,700,000
August 30 2024 Prefunded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	138,110
Stock Issued During Period, Shares, Warrant Exercise (in shares)							138,110
August 30 2024 Common Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) \| $ / shares	$ 5
August 30 2024 Common Warrants [Member] \| Maximum [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	975,610
December 2023 Pre-funded Warrants [Member]
Stock Issued During Period, Shares, Warrant Exercise (in shares)								238,000	269,032
Warrants Issued in June 2020 [Member]
Stock Issued During Period, Shares, Warrant Cashless Exercise (in shares)							3,398	2,549
Class of Warrant or Right, Warrants Exercised (in shares)							4,000	4,000
Warrants Issued in December 2023 [Member]
Stock Issued During Period, Shares, Warrant Exercise (in shares)							582,000	826,998
Proceeds from Warrant Exercises \| $							$ 977,770	$ 1,389,363,000,000
Registered Direct Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)	837,500	1,360,731	458,632	220,000
May 2024 Offering [Member]
Proceeds from Issuance or Sale of Equity \| $				$ 1,200,000
July 2024 Offering [Member]
Proceeds from Issuance or Sale of Equity \| $			$ 2,800,000
August 21 2024 Offering [Member]
Proceeds from Issuance or Sale of Equity \| $		$ 7,900,000
August 30 2024 Offering [Member]
Proceeds from Issuance or Sale of Equity \| $	$ 4,600,000
At-the-Market Program [Member]
Stock Issued During Period, Shares, New Issues (in shares)							84,600
Proceeds from Issuance of Common Stock \| $							$ 206,003
Stock Offering, Shares Available for Issuance, Value \| $							$ 4,274,260			$ 4,274,260
At-the-Market Program [Member] \| Weighted Average [Member]
Shares Issued, Price Per Share \| $ / shares							$ 2.51			$ 2.51
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio					15